Refer to the Exhibit.
The IGP is IS-IS. R2 has configured its loopback interface in Level 2 only. Referring to the exhibit, which statement is true?
A.
R2 advertises its loopback address to all L1 adjacencies.
B.
R1 cannot reach R2’s loopback address.
C.
R1 uses a default route to reach R2’s loopback address.
D.
R1 automatically selects R2 as the default gateway to reach R2’s loopback address.